Functional Perspective is a prescriptive approach that describes and predicts task-group performance when four communication functions are fulfilled. One of the four functions of Functional Perspective is Evaluation of Positive and Negative Characteristics, which is testing the relative merits of each opinion against the criteria selected; weighing the benefits and costs. An example of the Evaluation of positive and negative characteristics is from the movie Hangover 2. Stu is getting married in Thailand and is inviting Phil and Doug, but not their delusional friend Alan. When Doug finds out that Stu is not inviting Alan, he continuously begs him to invite him because it is the right thing to do and because Alan is Doug’s brother-in-law. Stu tries to put his foot down and give Doug the positives of Alan not going to Thailand and tell them the disadvantages they would encounter if he came along. They were weighing the positives and negatives, but in the end Alan ends up joining them in Thailand anyway.